Ключевые слова: accidents and disasters, back to school, chemical, clean, cleaner, cleaning, cleaning equipment, cleaning product, concepts, corridor, coveralls, decontamination, disinfection, entrance hall, epidemic, equipment, healthcare and medicine, horizontal, illness prevention, locker, occupational safety and health, protection, protective glove, protective suit, protective workwear, public building, safety, sanitation worker, school building, smoke, spray bottle, spraying, state of emergency, urgency, viral infection, virus, washing,